Edit 2:
Its perfectly reasonable to expect mobile chips to be overclocked when in use in a desktop since the P-M line of chips has always been easily overclockable on air. Just check over in the Xtreme Systems Forums to see what's been done in the past. I'm guessing the chip in the MacBook Pro will not be an overclocked part though.

Why do you assume that 1500 has something to do with the clock frequency?

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Why not? Its a pretty strange number to have in there otherwise. The codename for the 2Ghz part is "Core Duo T2500" after all and has nothing to do with 1500 either.

Edit: It *might* just be a type or an error in the EFI utility since the single core version of the Yonah 2Ghz part has a model number of T1500 as opposed to the dual core versions' T2500. Hopefully this is what it turns out to be. The Apple spec page for the iMac just says "1.83GHz or 2GHz Intel Core Duo processor" and doesn't specify which model number the chips actually are.

Why not? Its a pretty strange number to have in there otherwise. The codename for the 2Ghz part is "Core Duo T2500" after all and has nothing to do with 1500 either.

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SD - Terry (post 284) seems to have a theory on your question that you posted on the other board with the linked image. I do not know if his theory is correct, but it seems unlikely to me that these chips are overclocked. Apple is using chips at the freq for announced products and I can't identify any need that would push Apple to overclocking here.

given that 1500 is not only lower clock speed, but single core, i'd say it is unrelated to model number. it is one thing to imagine apple overclocking the cpus, but getting a dual core out of a single core processor not even in production yet is quite another story.

given that 1500 is not only lower clock speed, but single core, i'd say it is unrelated to model number. it is one thing to imagine apple overclocking the cpus, but getting a dual core out of a single core processor not even in production yet is quite another story.

Overclocking is relative to the recommended/stable clockspeed a CPU is marked as when shipped. If intel decides to run x chip at y frequency as default when given to a PC manufacturer that will use them in z machines made to handle it, it doesn't mean anything has been overclocked.

If anything, most processors intel ships are "underclocked" in the sense that they are defaulted to frequencies that are overly-safe.

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